Real Madrid's Karim Benzema, left, and Barcelona's Gerard Pique walk together during the La Liga match between Barcelona and Real Madrid. AP
The last clasico was in December, a 0-0 draw. At the time there were protests in Barcelona. Here fires burn towards the end of a Catalan pro-independence demo outside the Camp Nou. AP
A protester with tries to enter the Camp Nou stadium. AFP
A protester waving a Catalan pro-independence "Estelada" flag stands next to a burning barricade. AFP
Demonstrators argue with police officers towards the end of a Catalan pro-independence protest outside the Camp Nou stadium. AP
A police officer prepares to fire teargas during the Catalan pro-independence protest outside the Camp Nou stadium in Barcelona. AP
Police officers take position at the Catalan pro-independence protest outside the Camp Nou stadium. AP
A man throws a missile during the Catalan pro-independence protest outside the Camp Nou. AP
A boy poses in front of fires burning at the Catalan pro-independence protest. AP
A protestor gestures outside the Camp Nou stadium in Barcelona. AP
Police arrest a protester in the surroundings of Camp Nou stadium. EPA
Protesters and Catalan regional police clash in the surroundings of Camp Nou stadium. EPA
Protesters burn containers in the surroundings of Camp Nou stadium following el clasico. EPA
Protesters burn containers. EPA
Demonstrators wave Catalan pro-independence "Estelada" flags and placards reading "Spain, Sit and Talk" outside the Camp Nou stadium in Barcelona. AFP
A yellow ballon bearing the sentence "Youngster, the republic needs you" thrown by a supporter during the match. AFP
A security guard grabs a yellow ball thrown by a supporter. The protest help up the game briefly. AFP
Barcelona's Lionel Messi in action with Real Madrid goalkeeper Thibaut Courtois and Sergio Ramos. AP
Real Madrid's Gareth Bale goes for goal during the Spanish La Liga match between Barcelona and Real Madrid at Camp Nou. AP
Gareth Bale during el clasico at Camp Nou. AP
Barcelona's Frenkie de Jong, left, passes the ball as Real Madrid's Luka Modric defends. AP
Real Madrid's Karim Benzema, left, and Barcelona's Gerard Pique walk together during the La Liga match between Barcelona and Real Madrid. AP
The last clasico was in December, a 0-0 draw. At the time there were protests in Barcelona. Here fires burn towards the end of a Catalan pro-independence demo outside the Camp Nou. AP
A protester with tries to enter the Camp Nou stadium. AFP
A protester waving a Catalan pro-independence "Estelada" flag stands next to a burning barricade. AFP
Demonstrators argue with police officers towards the end of a Catalan pro-independence protest outside the Camp Nou stadium. AP
A police officer prepares to fire teargas during the Catalan pro-independence protest outside the Camp Nou stadium in Barcelona. AP
Police officers take position at the Catalan pro-independence protest outside the Camp Nou stadium. AP
A man throws a missile during the Catalan pro-independence protest outside the Camp Nou. AP
A boy poses in front of fires burning at the Catalan pro-independence protest. AP
A protestor gestures outside the Camp Nou stadium in Barcelona. AP
Police arrest a protester in the surroundings of Camp Nou stadium. EPA
Protesters and Catalan regional police clash in the surroundings of Camp Nou stadium. EPA
Protesters burn containers in the surroundings of Camp Nou stadium following el clasico. EPA
Protesters burn containers. EPA
Demonstrators wave Catalan pro-independence "Estelada" flags and placards reading "Spain, Sit and Talk" outside the Camp Nou stadium in Barcelona. AFP
A yellow ballon bearing the sentence "Youngster, the republic needs you" thrown by a supporter during the match. AFP
A security guard grabs a yellow ball thrown by a supporter. The protest help up the game briefly. AFP
Barcelona's Lionel Messi in action with Real Madrid goalkeeper Thibaut Courtois and Sergio Ramos. AP
Real Madrid's Gareth Bale goes for goal during the Spanish La Liga match between Barcelona and Real Madrid at Camp Nou. AP
Gareth Bale during el clasico at Camp Nou. AP
Barcelona's Frenkie de Jong, left, passes the ball as Real Madrid's Luka Modric defends. AP
Real Madrid's Karim Benzema, left, and Barcelona's Gerard Pique walk together during the La Liga match between Barcelona and Real Madrid. AP
